package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.val;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对 --->已完成
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @Override
    public PageResult page(Integer page, Integer pageSize, String name) {
        //开始分页
        PageHelper.startPage(page,pageSize);
        //查询数据
        Page<Employee> list = employeeMapper.selectAll(name);
        return new PageResult(list.getTotal(), list.getResult());
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        if(employee.getPassword() == null){
            String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
            employee.setPassword(password);
        }
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setStatus(StatusConstant.DISABLE);

        employeeMapper.insert(employee);
    }

    /**
     * 根据id查询员工信息
     *
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.findById(id);
    }

    /**
     * 修改员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    /**
     * 修改员工状态
     *
     * @param id
     * @param status
     */
    @Override
    public void updateStatusByEmployeeId(Long id, Integer status) {
       employeeMapper.updateStatusByEmployeeId(id, status);
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
       //1.根据id查询员工的旧密码信息
        String oldPassword = employeeMapper.selectPasswordByEmployeeId(passwordEditDTO.getEmpId());
        //2.判断旧密码是否正确
        //将传入的旧密码进行md5加密
        String inputOldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if(!inputOldPassword.equals(oldPassword)){
            throw new BaseException("旧密码输入错误！");
        }
        //3.修改密码
        employeeMapper.updatePasswordByEmployeeId(passwordEditDTO.getEmpId(), DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
    }

}
